WEAR STUDY ON SOME BOILER STEELS

Abstract

Erosion wear of three boiler steels: SA 210 Al, SA 213 Til, SA 213 T22, was examined using TR-470 air jet erosion tester and alumina as the erodent at the particle velocity of 30 m/s and the impact angles of 300and 90°. The test was conducted at different angle to know the effect of angle of impingement at the surface of component of boiler and it was found that more wear takes place at small angle. A steady state erosion wear was reached in the test conducted which was further used to compare the three steels. Among the studied boiler steels material loss was maximum for SA 210 Al steel. Another test which was conducted to study the erosive behaviour of the above three steels was slurry erosion wear test. Slurry erosion wear test was performed to examine steels using sand particles, used for preparing boiler bed, as erodent. Results of slurry erosion test verify results of air jet erosion test.